Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['547', 'l', '3545', '125', 'M', '9923', 'I']

547, 12, 3545, 125, 13, 9923, 9